Lever for scales and method for making the same



NOV. 4, L JAENICHEN LEVER FOR SCALES AND METHOD FOR MAKING THE SAME Filed Nov. 18, 1926 l7 L y /0 H /7 f? I A? L I I 4 i a," V7

A TTORNE Y.

Patented Nov. 4, 1930 UNETEFE @FFKCTE.

LOUIS JAENICHEN, OF SPRINGFIELD TOWNSI-ZIP, 0A1

LAND COUNTY, MICHIGAN, AS-

SIGNOR TO THE STANDARD COMPUTING SCALE COMPAEIY, OF DETROIT, MICHIGAN,

A CORPORATION OF MICHIGAN LEVER FOR SCALES AND IV'ETHOD FOB 1L :AKING THE SAME Application filed November 8, 1926.

dges or bearings therefor.

@thr ohfects will readily occur to those d i upon reference to the folon of the s me- 7 e view of ..ie lever;

.B i a in accordance with the e and 1 -achined to f r of adding the pivots. ewhat deeper than the usual form, that is, deeper from the knife edge to the bottom opposite said edge and h parallel side faces. There are also prepared a number of slugs of re tangular cross section having the same width and depth a the pivots have.

in forming the lever it is so shaped that it is deeper in those portions in which the pivotls knife edge pointed downward than in those in which the pivot edge points upward and is preferably provided with bottom surfaces forming an accurate plane.

The lever so formed is placed in a suitable Pnachine and grooves or slots cut across its surface at those cross lines where it is re .10 having one end 1 Serial No. 149,092.

quired to provide the lever with pivots 'ihese slots are cut parallel witleach other at right angles to the lergitudinal axis of lever and of such lepth that their bottoms are in tl )lane. in the 'ireferred form,

s are net the depth of the rectangu and slugs in the shallow s portions of the lever and t rice this depth in the deeper portions.

l i hen the lever has been thus prepared I nd slotted, the pivots are set in the shallow r e. with their edges up. In the deeper coves the rec-angular slugs are placed in e tom of the grooves and the pivots n the sl ts with the edges resting on This brings the 'Jivot edges all accurately on the same plane as will be readily seen.

After the pivots have been set in the slots as described they may be secured by suitable clamping plates (not shown).

The above method provides a quick, easy and accurate way of producing levers and also provides a lever in which the knife edge pivot-s may be readily replaced, if necessary, without dificulty.

In the drawings Fi 3, a lever is shown at and an intermediate portion 12 somewhat deeper than the rest. These portions, 11 and 12, are provided for the pivots whose knife edges are required to point downward. The portion 13 and end 14 are provided for pivots whose knife edges point upward. The grooves are indicated at 15, the spacing lugs a" 16 and the pivots at 17.

The form of lever just described is the preferred form but a modified form is shown in Fig. i. In the latter the grooves are not all cut to the same depth plane but are cut to just sufficient deoth to accommodate the pivots. The pivots are preferably all of the same depth and the cutters are set so that the pivots with knife edges downward will be above the pivots with knife edges upward a. distance equal to the depth of a pivot and so on, the higher cutters cutting grooves for those pivot-s whose knife edges point downward.

In Fig. 4, the various parts are numbered as in the other figures, except that the grooves are indicated at 15*.

The form first described presents some advantages over the modification as in the former the hardened knife edges rest on hardened slugs, and therefore will not cut in'and be- I come loose. Further, it is of advantage to be enabled to use asingle size of cutter and align several on a single shaft. 7

Having now described the invention and V the preferred form ofembodiment thereof,

it is to be understood that the said invention is not to be limited to the specific details herein set forth but only by the scope of the claims which follow.

I claim 1. A lever of non-uniform'thickness adapted to be provided'with pivots in the form of knife edged'bars, said lever being provided with a plurality of cross grooves cut to the same depth level, the grooves in the thinner portions of the lever being of a depth equal to the vertical dimension of a knife edged bar, the grooves in the thicker portions of the lever being twice this depth.

2. A scale lever having a plurality of pivots in alignment, said pivots consi'sting'of knife edged bars set in grooves across said lever, those pivots which point down being spaced from the bottoms of their respective grooves by means of spacing blocks having the same vertical dimension as the knife edged bars and all of said grooves being out to the same depth level.

3. A lever of non-uniform thickness adapted to be provided with pivots in the form of knife edged bars, said lever being provided in one side only'with a plurality of cross grooves cut to the samedepth level, the

grooves in the thinner portions of the lever being of a depthlevel equal to the vertical dimension of a knife edged bar, the grooves in the thicker portions of the lever being deeper. r

4. A scale lever having a plurality of pivots in parallel alignment, all of said pivots consisting of knife edged bars set in grooves across one side of said lever those pivots with knife edges down being spaced from the bottoms of their respective grooves by means of spacing blocks. V

LOUIS JAENIQHEN. 

